Effect of mitigation techniques on ammonia emissions and nutrients recovery: the role of fertigation with digestate

Guido, Viviana; Af, Finzi; Piazzi, Pietro; Ferrari, Omar; Ricco, Celeste Righi; Riva, Elisabetta; Provolo, G.

doi:10.1109/metroagrifor50201.2020.9277608

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…Considering a broadcast spreader, the expected losses are around 47-60% of initial TAN content, which are reduced to 20-25% by using the closed-slot injection and to 3-4% considering the integration with mitigating interventions during storage, such as acidification (Finzi et al, 2019). Furthermore, even the use of a digestate management system based on the fertigation technique makes it possible to reduce ammonia emissions by around 65% (Guido et al, 2020b), but the emission flows are still higher than those found in this study during the separation with vibrating screens.…”

Section: Impact Of the Filtration Process On Nitrogen Lossesmentioning

confidence: 99%

Evaluation of ammonia emissions from filtration of digestate used for fertigation

Ricco

Guido

et al. 2021

J. Agric. Eng.

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Fertigation can be a suitable technique for utilizing digestate, minimizing nitrogen losses, and contributing to circularity within a farming system. For this purpose, digestate usually is first processed with a screw-press separator. However, further filtration is required to remove particles that could clog the nozzles of drip or sprinkling irrigation systems. Advanced filtration can be obtained using mechanical separation with screens having openings of 100- 300 μm. This operation can be another source of ammonia emission, but this aspect has not been adequately investigated. This study aimed to address this knowledge gap by evaluating the emissions from three different filtration systems for digestate. The study was conducted in three different farms located in Lombardy (Italy) using digestate to fertigate maize by drip irrigation (two farms) and pivot irrigation (one farm). Ammonia emissions were measured with passive samplers and the fluxes were examined using an inverse dispersion model implemented in Windtrax software. The emissions were measured both when the filtration systems were in operation and when they were switched off. Ammonia emissions (mean values between 375 and 876 μg NH3/m2/s) tended to increase during operation of the filtration systems. However, no significant differences were found in the emissions from active and inactive equipment on any of the farms. The emissions from the filtration systems were higher than from a storage tank (22-67 μg NH3/m2/s). However, the mean emissions amounted to only 0.3% of the nitrogen content of the digestate. These emissions can be considered irrelevant in the context of the whole management scheme for digestate. This work provides a first insight on ammonia emissions arising from advanced filtration of digestate, with specific reference to Po Valley farming systems. Further studies are required to improve knowledge about emissions from the entire digestate management process, including the treatments required for specific application techniques.

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Section: Impact Of the Filtration Process On Nitrogen Lossesmentioning

confidence: 99%

Evaluation of ammonia emissions from filtration of digestate used for fertigation

Ricco

Guido

et al. 2021

J. Agric. Eng.

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“…Furthermore, the image emphasises the impact on the environment, illustrating that ammonia gas emissions lead to air, water, and soil contamination. In general, exposure to ammonia can be harmful to the human body, as it readily dissolves in water and can interact with moist mucous membranes, potentially leading to eye, respiratory, lung, and skin diseases [8][9][10]. Furthermore, some studies have reported that high levels of ammonia exposure can cause neurological symptoms, such as headaches, dizziness, and confusion.…”

Section: Introductionmentioning

confidence: 99%

E-Nose-Driven Advancements in Ammonia Gas Detection: A Comprehensive Review from Traditional to Cutting-Edge Systems in Indoor to Outdoor Agriculture

Moshayedi

Khan

et al. 2023

Sustainability

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Ammonia (NH3) represents a perilous gas that poses a substantial hazard to both human well-being and the environment, particularly within agricultural regions. Agricultural activities constitute a primary source of ammonia emissions. Thus, effective monitoring and measurement of ammonia sources in agriculture are imperative for mitigating its adverse impact. However, not all existing ammonia detection methods are suitable for discerning the low concentrations typically encountered in agricultural ammonia volatilizing (ranging from 0.01 to 5 parts per million). Consequently, curtailing ammonia volatilization from farmland assumes paramount importance, with real-time monitoring serving as a crucial mechanism for assessing environmental contamination and minimizing agricultural ammonia losses. Deploying appropriate detection methodologies ensures that requisite measures are taken to safeguard human health and the environment from the deleterious repercussions of ammonia exposure. The present paper introduces a comprehensive approach to detecting and analyzing ammonia in agricultural settings. It elucidates the merits and demerits of conventional indoor and outdoor ammonia detection methods, juxtaposing them with the innovative technology of Electronic nose (E-nose). Within the paper, seven widely employed ammonia detection methods in farmland are scrutinized and compared against traditional techniques. Additionally, the constructional aspects and distinct components of E-nose are meticulously delineated and appraised. Ultimately, the paper culminates in a comprehensive comparative analysis encompassing all the aforementioned methodologies, elucidating the potential and limitations of E-nose in facilitating ammonia detection endeavors within agricultural contexts.

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Effect of mitigation techniques on ammonia emissions and nutrients recovery: the role of fertigation with digestate

Cited by 2 publications

References 14 publications

Evaluation of ammonia emissions from filtration of digestate used for fertigation

Evaluation of ammonia emissions from filtration of digestate used for fertigation

E-Nose-Driven Advancements in Ammonia Gas Detection: A Comprehensive Review from Traditional to Cutting-Edge Systems in Indoor to Outdoor Agriculture

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